Shaft Keyway Depth Calculator
This calculator is for determining the total depth from the outside of a shaft to the bottom
of a keyway. Once this is known, the cutter can be fed down to the required depth without
taking any measurements other than that indicated by the graduations or scale on the machine.
To determine the total depth of the keyway from the outside of the shaft to the
bottom of the keyway one must calculate the height of the arc which is designated as dimension
A. This shop aid will give dimension A for a given diameter of shaft D and
the width of the key W.
1. Enter the width of key W.
2. Enter the diameter of shaft D.
3. Click Calculate to get dimension A.
4. Add A to the desired keyway depth H to get the total keyway depth.
5. Click Reset to start over.
W
D
A =
Note: Much effort has been made to make sure that this information is accurate. However, it is
the user's responsibility to verify that the provided information is correct before using it.
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